Alarm for boilers



(Mmm J. o-'GONNOR & 0. .A QTURNER.

ALARM FOR. BOILERS.

No. 566,612. Patented Aug.`.25,v 1896.

ggf/ 26 WMA/g A TTUHNEYS.

msmoums Psvcns on. maremma.. wAsHmmnN, o c.

UNITED STATES PATENT OFFICE.

JOHN OOONNOR AND OOLLATINUS A. TURNER, OF NEW YORK, N. Y., AS- SIGNORS TO JOHN OCONNOR AND OOLLATINUS A. TURNER, OF SAME PLACE, AND DAVID D. TURNER, OF JERSEY CITY, 'NEW JERSEY.

ALARM FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 566,612, dated August 25, 1896.

Application filed March 20, 1896.

To @ZZ whom itmay concern:

Be it known `that we, JOHN OOONNOR and OoLLArINUs A. TUENEE, of New York city, in the county and State of New York, have invented a new and Improved Alarm for Boilers, of which the followingis a full, clear, and exact description.

This invention relates to certain improvements in alarms for steam-boilers and the 1o like, and especially that class of alarms which are adapted to give warning of the rise or fall of the water-level in the boiler above and below a certain predetermined level; and the object of the invention is to provide a device I 5 of this character, of a simple and inexpensive construction, which shall be adapted for application to boilers of various kinds, and which shall be capable of adjustment within certain limits, so as to better adapt it for use.

The invention consists in an alarm comprising a cylinderhaving its upper and lower ends open to the boiler and adapted to be located adjacent to the water-level therein, a

float in the vcylinder arranged to rise and fall with the water-level, stems at the upper and lower ends of the cylinder to be moved by said iioat, contacts to be engaged by the stems when used, electric circuits including the contacts and stems, andalarm devices to 3o be operated from said circuits.

The invention also contemplates certain novel features of the construction, combination, and arrangement of the various parts of the improved alarm whereby certain im- 3 5 portant advantages are attained, and the device is made simpler, cheaper, and otherwise better adapted and more convenient for use than various other similar devices heretofore employed, all as will be hereinafter fully set 4o forth.

The novel features of the invention willbe carefully set out, and defined in the appended claims.

Reference is to be had to the accompanying drawings, forminga part of this specification,

in whichsimilar characters of reference indicate corresponding parts in both views.

Figure l is a sectional view showing an alarm constructed in accordance with our Serial No. 584,127. (No model.)

invention, and Fig. 2 is a sectional view showing a modified construction of the device.

Referring first to Fig. l, l indicates a part of a steam-boiler, which may be of any kind, and 2 and 3 indicate pipes connecting with the interior thereof, above and below the water-level, respectively, the outer ends of said pipes being connected, as clearly shown, with the upper and lower ends of the verti cally arranged cylinder or float chamber 4, having its interior 5 adapted to receive the water and steam from the boiler. A ballfloat 6 of any kind is arranged in the cylinder or chamber 4, and rises and falls with the level of the water therein.

The cylinder or chamber 4 may be of any preferred construction, but, as herein shown, it is provided with upper and lower heads 7, having centrally arranged and perforated screw-threaded nipples 8 on their outer sides, which nipples are engaged by screw-caps 9, forming stuffing-boxes through which pass the lower and upper stems lO and ll, having on their inner ends, within the cylinder or chamber 4, enlargements or heads l2 and 13, adapted to be engaged by said float 6 when the water-level rises or falls, so as to move the said stems lO and ll longitudinally through the stuffing-boxes.

Each stem lO and ll is provided outside its stuffing-box with a collar 14, adjustably secured upon it, against which collar bears a spring l5, coiled upon the same and having its opposite end arranged to bear against a bracket 1G, extended from the side of the generator l, whereby, as will be seen, the stems l0 and ll are held with their heads pressed toward each other inside the cylinder or chamber 4, and in position to be moved by the float 6. Each stem l0 and ll is also provided at its outer end with an angular or lateral arm 17, and the extremity of the upper arm 17 is arranged to engage, when the stem ll is moved, an adjustable screw I8, held in a suitably-arranged post 19 and connected by a circuit-wire 2O with a battery 2l and bell 22, and from the battery 2l a wire 23 eX- tends to the cylinder or chamber 4.

By adjusting the collars 14 it is obvious that the stems l0 and ll may be made to project more or less into the cylinder el, and thus provide for sounding the alarm at any desired water-level. to which the inner ends of said stems may be set. Of course when the stems l0 and ll are adjusted the screw-contacts 18 and 2i must be correspondingly adjusted.

The lower arm l7 is likewise arranged to engage, when the stein l0 is moved, an adjusting-screw 2l, mounted in a suitably-arranged post 25, which is connected by a eircuit-wire 26 with the bell 22 and battery 2l, and in this way it will be seen that when water in the boilel1 rises or falls the float 6 will rise or fall simultaneously, so as to move one or the other of the stems lO or ll. longitudinally and engage one of the arms 17 with the corresponding ac'ljusting-screw, so as to close the circuit through the bell and sound the saine.

rl`he screws lS and 2i are so arranged that they act as stops to prevent further movement of the arms 17 when said arms come in contact with the screws, so that the circuit will be held closed and the bell continue to ring as long as the level of the water in the boiler remains high orlo w. Tere said screws arranged merely in position to be engaged by the arms, it is evident that said arms would move past the screws, so as to again open the circuit and stop the ringing of the bell.

In the construction shown in Fig. 2 a chamber 27, of globular form, is employed, the interior of which is in communication with the interior of the generator.' at the water-level by means of a pipe 2S, and in said chamber 27 is arranged a ball-iloat 2f), held. on a rod 3l, extending' through a reduced neck or cxtension 30, formed on the side of the chamber 27, said rod being pivoted on a shaft 32, eX- tending outside the chamber and having at its outer end a depending arm 323, arranged to contact with an adjusting-screw 3i, held in a suitably-arranged post 35, connected by means of a circuit-wire 5Gv with a bell 37 and battery 3S, another circuit-wire 39 being arranged to extend between the battery and the chamber 27. ln this way it will be seen that as the water-level in the boiler falls the arm 3l, on which the float is held, will swing downward so as to bring the arm in contact with the adjlisting-screw Si and ring the bell. The screw liet serves as a stop to limit the movement ot' the arm acting in a manner similar to the screws 1S and 2i, above referred to.

From the above description it will be seen that the improved alarm is oi an extremely simple and inexpensive construction, and is especially adapted for the purposes for which it is intended; and ,it will also be obvious that the invention is susceptible of some modification without material departure i'ro n1 its principles and spirit, and for this reason we do not wish to be understood as limiting ourselves to the exact form of the parts herein set forth.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- Y l. In an alarm for boilers, the combination of a chamber, a float arranged therein and adapted to rise and fall with the level of the water in the boiler, a rod connected to and actuated by the float and extending outside the chamber, a contact-screw arranged to engage and stop the rod when the same is moved, a support in which the contact-screw is adjustably mounted, and an electric circuit including a battery and a bell, and having :t'or its terminals the said contact-screw and rod, substantially as set forth.

2. ln an alarm for boilers, the combination of a chamber, a float arranged therein to risc and fall with the level oi' the water in the boiler, rods extending through the upper and lower portions of the chamber with theirinner ends in position to be engaged and actuated by the float, springs to hold the rods pushed into the chamber, contacts to be engaged by the outer ends of the rods when the same are moved, and an electric circuit including a battery and an alarm and having for one terminal the said rods and for its other terminal the contacts engaged thereby,substantially as set forth.

In an alarm for boilers, the combination of a chamber, a iloat arranged therein to rise and fall with the level of the water in the boiler, rods extending through the upper and lower portions of the chamber withtheir inner ends in position to be engaged by the lloat, collars adjustably mounted on said arms at the outer side ot' the chamber, whereby by adjusting the collars longitudinally of the rods the said rods may be made to extend into the chamber more or less, springs to hold the rods yi eldingly in the chamber, adjustable contacts to be engaged by the outer ends of the rods when the same are moved, and an electric circuit including a battery and an alarm, and having for one terminal the said rods and for its other terminal the contacts adapted to be engaged by the rods, substantially as specied.

JOHN OCONNOR. COLLATINUS A. TURNER. 'itnesses:

J. D. CAPLINGER, JN0. M. RITTER.

IOO

IIO 

